Possessed said:
An update which is in fact not an update at all, but a sad story.

I somehow accidently overwrote my project file and everything I did so far was lost.

Ouch! Sorry to hear it! Hope you haven't lost any hair, or had too much turn white over that. :p

I must say that when I've had similar setbacks, I always do WAY better the next time. I find I work much faster because I have a better way of doing it and I also remember to add many things I forgot the first time. (I'm thinking specifically of a huge dream journal I wrote, lost, then started again from scratch...) Hopefully your re-do will turn out that way too.